JPH06344335A - Kneading control method in kneader - Google Patents

Abstract

PURPOSE:To control the kneading in a kneader so as to be capable of always obtaining constant kneading quality. CONSTITUTION:A kneading data waveform (power, temp.) is automatically collected and registered by compound in order to prevent such a phenomenon that the kneading quality of rubber to be kneaded is fluctuated on the basis of a cause such as the change in atmospheric temp. or the change in power consumption not to become constant and recent data by compound is statistically processed to set the range at the time of normality and the range at the time of abnormality to set a standard kneading curve and, when the waveform of the kneading batch is judged to be an abnormal waveform, it is removed. When the average waveform of the kneading batch is changed outside the tolerant value range of the standard kneading curve, the specification of a kneading parameter is altered so as to approximate to a kneading reference pattern to always obtain constant kneading quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kneading control method in a kneading machine, and more specifically, the kneading quality of rubber kneaded in the kneading machine changes depending on causes such as changes in atmospheric temperature and changes in power consumption. In order to prevent the kneading quality of the rubber to be kneaded deviates from the standard, the kneading specification is changed and controlled so as to approximate the kneading standard pattern, and the kneading standard pattern is always set to prevent it from becoming uneven. The present invention relates to a kneading control method in a kneading machine capable of obtaining a constant kneading quality.

[0002]

2. Description of the Related Art Conventionally, various methods have been performed to prevent the kneading quality of rubber to be kneaded in a kneader from varying and becoming non-uniform due to changes in atmospheric temperature and power consumption. ing. For example, Japanese Patent Publication No. 60-3353
In No. 0 (kneading control method of closed type kneading machine), the reference pattern of the electric power reference pattern at the time of proper operation and the operating condition of the temperature of the kneading machine are stored in the control device in advance, and according to the operating condition pattern, This is a method of controlling various operating conditions and adjusting means so as to follow the reference pattern when a difference between the power reference pattern and the actual power occurs.

Further, in Japanese Patent Laid-Open No. 51-93471 (kneading control method for rubber kneading machine), the plasticity of rubber is detected and the power consumption and the total number of revolutions of the rotor are corrected and controlled according to the value of the plasticity. However, it is a method of controlling the plasticity of the rubber and the carbon dispersion to be predetermined values.

[0004]

However, in order to keep the kneading quality of the rubber as described above constant, in the former kneading control method of the closed type kneading machine, the kneading curve varies greatly within the same kneading lot. However, there is a problem that the kneaded rubber is an abnormal product even if it is fed back and controlled in real time, and a kneading rubber of constant quality can never be obtained, and the latter kneading control method of the rubber kneading machine has a problem. ,
Even if the feedback is controlled in real time, only the kneading patterns including the abnormal ones are forcibly adjusted, and even in this case, the kneading quality of the rubber to be kneaded cannot be constantly controlled.

The present invention has been devised by focusing on such a conventional problem, and after determining the standard kneading curve in advance,
If abnormal kneading occurs, it is removed.When fluctuations outside the allowable value of the standard kneading curve occur, the kneading specifications are changed so as to approximate the standard kneading curve at any time, so that a constant It is an object of the present invention to provide a kneading control method in a kneading machine that can obtain kneading quality.

[0006]

In order to achieve the above object, the present invention automatically collects an average kneading waveform of various rubber kneading data in advance by a statistical means, and from this average kneading waveform, a normal time is obtained. The range and the range at the time of abnormalities are set as standard kneading waveforms, and when the kneading batch at the time of rubber kneading has abnormal waveforms out of the standard, it is removed, and the average kneading waveform of each kneading lot, Compared with the standard kneading waveform, if the waveform fluctuation is outside the allowable value range in the normal state,
The gist is to rewrite the kneading specifications of various rubber kneading set in advance and to control so as to refer to various rubber kneading data at the time of rubber kneading from the next time.

[0007]

The present invention is constructed as described above, and in order to prevent the kneading quality of the rubber to be kneaded from varying and becoming inconsistent due to the causes such as the change in atmospheric temperature and the change in power consumption, the compound is compounded. Separately, the kneading data waveforms (power, temperature, etc.) are automatically collected and registered, and the recent data for each compound is statistically processed to set the normal range and abnormal range, and the standard kneading curve is set. Then, if it is determined that the waveform of the kneading batch is an abnormal waveform, remove it,
If the average waveform of the kneading lot is outside the allowable range of the standard kneading curve, the kneading parameter specifications can be changed so as to approximate the kneading standard pattern, and a constant kneading quality can be obtained. It was done like this.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a flow chart of a kneading control method in a kneader embodying the present invention. As an outline of the present invention, the kneading quality of rubber to be kneaded is changed based on causes such as a change in atmospheric temperature and a change in power consumption. In order to prevent it from becoming unstable, the kneading data waveforms (power, temperature, etc.) are automatically collected and registered for each compound, and the recent data for each compound is statistically processed to determine the normal range and abnormal conditions. When setting the range and the standard kneading waveform and determining that the waveform of the kneading batch is an abnormal waveform, remove it and make the average waveform of the kneading lot outside the allowable range of the standard kneading curve. If there is a change in kneading, change the kneading parameter specifications so as to approximate the kneading standard pattern, and use it as a reference for the next kneading data so that a constant kneading quality can always be obtained. It is intended.

More specifically with reference to FIG. 1, the kneading machine determines kneading specifications for each compound (step (1)), and automatically collects kneading data waveforms (power, temperature, etc.) for each compound. And register it in the kneading database (step (2)). Next, statistically process the recent data for each compound, set the normal range and the abnormal range, calculate the average waveform, set it as the standard kneading waveform, and waveform of each kneading lot during rubber kneading. And the standard kneading waveform are compared and collated, and when it is determined that the waveform of the kneading batch is an abnormal waveform, it is removed (step (3)).

Next, it is judged whether or not the average waveform of each kneading lot excluding the abnormal waveform has the above-mentioned standard.
(Step (4)), when it is determined that there is no standard, a standard is generated under a certain standard rule as a criterion so that the waveform for each compound is used as a reference waveform (Step (5)),
Register in the kneading database (step (2)). Also,
When it is determined that the waveform of each kneading lot excluding the abnormal waveform has the above-mentioned standard, whether the waveform of each kneading lot is inside or outside the standard of the kneading waveform is determined as an average waveform and a standard kneading waveform. Judgment is made by comparing and collating (step (6)), if it is within the standard, it is fed back to the kneading database (step (2)), and if it is outside the allowable value range within the standard, fluctuation of the standard The controllable kneading parameter specifications can be changed (step (7)), fed back to the kneading database and registered (step (2)), and can be reflected in the kneading of the next kneading lot. It is possible to obtain a certain kneading quality.

The types of kneading parameters that can be controlled include, as shown in FIG. 1, increase / decrease in the number of rotations of the motor, increase / decrease of ram pressure, adjustment of ram position, temperature control temperature, clearance (rotor chamber), feed of raw material. There are timing, kneading time, kneading energy, etc., and specific examples of the judgment points on the kneading parameters are as shown in Table 1.

[0012] Change of kneading specification in step (7), that is, average waveform,
The judgment of the standard and the change of the kneading specification are calculated and executed at the end of the kneading lot. Further, as an example of changing the specifications of the kneading parameters, for example, not all patterns are matched as shown in FIGS. 2 and 3, but important points of each waveform are matched with a standard, and a judgment point of each point is adjusted. Consider points such as inflection points of a pattern limited to time.

The present invention prevents the kneading quality of the rubber to be kneaded as described above from varying and becoming non-uniform due to causes such as a change in atmospheric temperature and a change in power consumption. (Electricity, temperature, etc.) are automatically collected and registered, and recent data for each compound are statistically processed to set a normal range and an abnormal range to set a standard kneading curve, and a kneading batch If it is determined that the waveform is abnormal waveform, remove it, and if the average waveform of the kneading lot is out of the allowable range of the standard kneading curve, approximate it to the kneading reference pattern. The specifications of the kneading parameters can be changed and reflected in the kneading of the next kneading lot, and a constant kneading quality can always be obtained.

[0014]

According to the present invention, after the standard kneading curve is determined in advance as described above, when abnormal kneading occurs, it is removed, and thereafter, fluctuations outside the allowable value of the standard kneading curve occur. In this case, since the kneading specifications are changed to approximate the standard kneading curve at any time, there is no variation in quality, and since the database has average kneading characteristics, the production plan should be performed by a simple procedure. When the kneading curve is significantly deviated, an abnormal compound can be detected, and a constant kneading quality can always be obtained.

The kneading parameters whose specifications have been changed so as to approximate the kneading standard pattern can be reflected in the kneading of the next kneading lot, so that a constant kneading quality can always be obtained, and automation is carried out for production. There is an effect that it is possible to improve the sex.

[Brief description of drawings]

FIG. 1 is a flowchart of a kneading control method embodying the present invention.

FIG. 2 shows a specific example of a method of determining whether or not the waveform of each kneading lot excluding an abnormal waveform falls within a standard kneading curve, and is a specific example of a determination point of a power curve.

FIG. 3 shows a specific example of a method of determining whether or not the waveform of each kneading lot excluding an abnormal waveform falls within a standard kneading curve, and is a specific example of a determination point of a temperature curve.

Claims (1)

[Claims] 1. A rubber kneading machine automatically collects an average kneading waveform of various rubber kneading data in advance by statistical means, and from this average kneading waveform, a normal range and an abnormal range are obtained. With the standard kneading waveform set, if there is a non-standard abnormal waveform in the kneading batch at the time of rubber kneading, remove it, and compare the average kneading waveform of each kneading lot with the standard kneading waveform, If the waveform fluctuation is outside the permissible value range during normal operation, the preset kneading specifications of various rubber kneading are rewritten, and control is performed so as to refer to various rubber kneading data for the next rubber kneading. And a method for controlling kneading in a rubber kneader.